"Wie heißt du". Of course you could also say "Wie ist dein Name"
This is in the wrong section, but each mineral are different because they are made up of atoms and atoms are different from each other. Their differences come from the variability of atoms.
No atom is alike one another because they have different numbers (protons). Hydrogen is 1, Helium is 2, etc. etc. you get it. Every atom has a different chemical composition, therefore altering a mineral's physical appearance, and other characteristics.
They can be compared to “the, that, there/them”
Dir Frau geht in den Supermarkt. Nominativ
Die Frau kauft in dem Supermarkt
Dative
Ich will alles schon gut machen
Genitive
Germany? I mean that's all I could think of based on the point youre posting this in the German Category.